/*
 *  Copyright 2008-2010 NVIDIA Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#pragma once

#include <thrust/tuple.h>
#include <thrust/detail/tuple_meta_transform.h>

namespace thrust {

namespace detail {

template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction,
         unsigned int sz = thrust::tuple_size<Tuple>::value >
struct tuple_transform_functor;


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 0> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        return thrust::null_type();
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 1> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 2> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 3> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 4> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 5> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)),
                         f(thrust::get<4>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 6> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)),
                         f(thrust::get<4>(t)),
                         f(thrust::get<5>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 7> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)),
                         f(thrust::get<4>(t)),
                         f(thrust::get<5>(t)),
                         f(thrust::get<6>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 8> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)),
                         f(thrust::get<4>(t)),
                         f(thrust::get<5>(t)),
                         f(thrust::get<6>(t)),
                         f(thrust::get<7>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 9> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)),
                         f(thrust::get<4>(t)),
                         f(thrust::get<5>(t)),
                         f(thrust::get<6>(t)),
                         f(thrust::get<7>(t)),
                         f(thrust::get<8>(t)));
    }
};


template < typename Tuple,
         template<typename> class UnaryMetaFunction,
         typename UnaryFunction >
struct tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction, 10> {
    static __host__ __device__
    typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
    do_it(const Tuple& t, UnaryFunction f) {
        typedef typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type XfrmTuple;

        return XfrmTuple(f(thrust::get<0>(t)),
                         f(thrust::get<1>(t)),
                         f(thrust::get<2>(t)),
                         f(thrust::get<3>(t)),
                         f(thrust::get<4>(t)),
                         f(thrust::get<5>(t)),
                         f(thrust::get<6>(t)),
                         f(thrust::get<7>(t)),
                         f(thrust::get<8>(t)),
                         f(thrust::get<9>(t)));
    }
};


template < template<typename> class UnaryMetaFunction,
         typename Tuple,
         typename UnaryFunction >
__host__ __device__
typename tuple_meta_transform<Tuple, UnaryMetaFunction>::type
tuple_transform(const Tuple& t, UnaryFunction f) {
    return tuple_transform_functor<Tuple, UnaryMetaFunction, UnaryFunction>::do_it(t, f);
}

} // end detail

} // end thrust

